Small Block Chevy Pulley Kit, SBC Pulley Set, Short Water Pump Pulley

Kit includes a cast aluminum double groove cast aluminum water pump pulley, crank pulley, and a matched pair of heavy duty belts. Slows water pump speed by 20% for increased horsepower. Upper Pulley Grooves: Two. Lower Pulley Grooves: Two. Upper Pulley Diameter: 6-5/8" O.D. Lower Pulley Diameter: 5-7/16" O.D. Upper Pulley Snout Hole: 5/8" O.D. (can be drilled out to 3/4") Fits Small Block Compatible with Chevy Compatible with V8 with '55-'68 short-style water pump with 5/8" shaft. Note: The lower crank pulleys in our combo kits are manufactured thicker than normal stock pulleys. This requires longer 3/8" bolts to be purchased separately. Allen head type bolts recommended. Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump.

• 20% pulley set reduces water pump and fan speed which reduces parasitic losses and increase usable horsepower
• CNC machined aluminum construction with deep grooves eliminates thrown belts
• Ideal for circle track and other race engine operating above 6500 RPM
• Double groove pulleys allow for other accessories to be used such as power steering pump and alternator
• A matched pair of heavy duty belts are included so you don't have to search for the proper belt length